It’s a more extensive use of the app than previously reported and sheds new light on how commonly the Trump administration’s national security team relies on Signal.

Amid the backlash to the Trump administration’s use of the private messaging app Signal for sensitive U.S. military planning in Yemen, Politico reported Wednesday that national security adviser Mike Waltz’s team set up at least 20 such chats.

Earlier this week, the Wall Street Journal reported that Waltz had “created and hosted multiple other sensitive national-security conversations on Signal with cabinet members,” including chats centered around brokering a lasting peace deal between Russia and Ukraine.